SYKES : NEW FORMS OF CATAULUS. 



57 



Cataulus marginatus var. notata, n. var. 



(Fig. 3-) 



Shell larger than the typical form ; shape more pyramidal ; whorls more 

 flattened ; longitudinal striation almost absent ; the malleation in the variety 

 is much stronger, especially on the last half of the last whorl, where a 

 second carina, above the normal one, is often present, leaving a smooth area 

 between them ; mouth duplex, pale flesh colour. 



Alt. 17 : diam. max. (last whorl) 5.5 millim. 



Fig. 3. — Cataulus inarginalus 

 var. notata, n. var. X 2. 



Fig. 4. — Cataulus congener 

 n. sp. X 2, 



Cataulus eongrener, n. sp. 



(Fig- 4-) 



Shell elongately pyramidal, rimate, yellow, becoming tinged with red- 

 brown on the earlier whorls, these latter are smooth, Avhile the rest of the 

 shell is closely, finely, longitudinally striate ; suture well impressed ; whorls 

 7.',, convex; umbilical region moderate in size, sculptured as the rest of 

 the shell ; aperture sub-circular ; lip white, double, the outer part well 

 reflected and thin at the edge, slightly produced at the right upper margin, 

 the inner part circular and produced ; basal canal small, the carina being 

 whitish. 



Alt. 16.5 ; diam. max. (last whorl) 6 millim. 



Resembling in form a dwarf G. aureus, but separable by inter alia, the 

 shape of the outer lip, and the duplication of the lip, as also by the small 

 basal canal. 



